During an investigation, interviews with witnesses will often need to be supplemented by searches for and seizures of property connected with commission of the crimes being investigated. If a building to be searched is located in the United States and off a military installation, then it makes no difference whether a serviceman owns that building. To be legal, the search must be conducted on the same basis as if civilians alone were involved and if the results of the search were to be offered in evidence in a Federal civilian court. What this means is that, within the United States and its territories, a search warrant is usually needed. Under the Fourth Amendment and Federal Rule 41 of Criminal Procedure both Federal courts and State courts of record can issue such warrants if there is probable cause for the search and if the objects to be sought are specifically described in the warrant. Only certain types of objects can be searched for and seized under a search warrant. For instance, a warrant cannot be obtained to search for an object or document merely because it would be evidence showing that a had been committed and by whom. Instead, generally speaking a Federal search warrant is obtainable only to search for the tools of or the fruits of crime. In this context the word crime refers only to that which would be an offense under some Federal enactment, including the Uniform Code of Military Justice. An offense under State law is not included.